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fzus63 kmqt 260238
glfls 
363 

open lake forecast for lake superior
national weather service marquette mi
938 pm est thu feb 25 2021

for waters beyond 5 nautical miles of shore on lake superior.

waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.synopsis...a 30.3 inch high pressure ridge will move through the
ohio river valley tonight and reach new england by friday 
morning. a 29.4 inch low pressure system will drop se from the 
canadian rockies to lake winnipeg friday morning, passing over 
lake superior saturday morning as a 29.7 inch trough. troughing 
over lake superior weakens to 30.0 inches saturday night until a 
29.8 inch low develops on the central plains sunday morning. this 
low lifts ne into the northern great lakes sunday night at 29.7 
inches. ridging of 30.2 inches then builds back over lake superior
behind the exiting low on monday with a low pressure of 29.5 
inches will move across lake superior late tuesday.

lsz162-261045-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
938 pm est thu feb 25 2021 /838 pm cst thu feb 25 2021/

.rest of tonight...southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. waves 2 to 4 feet building to 3 to
6 feet occasionally to 8 feet. 
.friday...southwest winds 20 to 30 knots backing south by late
morning, then becoming southwest to 30 knots with a few gale
force gusts to 35 knots possible by mid afternoon. a slight
chance of rain and snow showers in the afternoon. waves building
to 5 to 8 feet occasionally to 10 feet. 
.friday night...southwest winds 20 to 30 knots diminishing to
10 to 20 knots. a chance of rain showers in the evening. a slight
chance of snow showers. waves subsiding to 2 to 4 feet. 
.saturday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.saturday night...northeast winds 5 to 15 knots backing north
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.sunday night...west winds 15 to 25 knots veering northwest after
midnight. a chance of snow showers. waves subsiding to 1 to
3 feet. 
.monday...north winds 15 to 25 knots becoming south 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$
fzus63 kmqt 260238
glfls 

lsz263-261045-
lake superior from saxon harbor wi to upper entrance to portage
canal mi 5nm off shore to the us/canadian border including isle
royale national park-
938 pm est thu feb 25 2021

.rest of tonight...southwest winds 10 to 20 knots increasing to
20 to 30 knots. waves 3 to 6 feet occasionally to 8 feet. 
.friday...southwest winds 20 to 30 knots becoming south to
30 knots with a few gale force gusts to 35 knots possible.
sprinkles and a slight chance of snow showers in the afternoon.
waves building to 5 to 8 feet occasionally to 10 feet. 
.friday night...southwest winds 20 to 30 knots diminishing to
15 to 25 knots by midnight. a chance of snow showers, possibly
mixed with rain. waves subsiding to 3 to 5 feet occasionally to
7 feet. 
.saturday...west winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots backing north
after midnight. waves calm to 2 feet. 
.sunday...northwest winds 10 to 20 knots becoming west 15 to
25 knots in the afternoon. a chance of snow in the morning. waves
building to 3 to 5 feet occasionally to 7 feet. 
.sunday night...west winds 15 to 25 knots becoming northwest
20 to 30 knots after midnight. heavy freezing spray. a chance of
snow showers. waves building to 3 to 6 feet occasionally to
8 feet. 
.monday...northwest winds 20 to 30 knots becoming south 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 
.tuesday...southwest winds 20 to 30 knots diminishing to 15 to
25 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$

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